﻿/*
* Copyright (c) 2010-2012 Tesla Engine Group
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/


namespace Tesla.Graphics.Implementation {
    /// <summary>
    /// Abstract class for concrete subclasses to provide the underlying implementation of <see cref="Effect"/>.
    /// </summary>
    public abstract class EffectImplementation : GraphicsResourceImplementation {
        private IEffectTechniqueCollection _techniques;
        private IEffectParameterCollection _parameters;

        /// <summary>
        /// Gets or sets the current technique.
        /// </summary>
        public abstract IEffectTechnique CurrentTechnique {
            get;
            set;
        }

        /// <summary>
        /// Gets the collection of techniques.
        /// </summary>
        public IEffectTechniqueCollection Techniques {
            get {
                return _techniques;
            }
        }

        /// <summary>
        /// Gets the collection of uniform parameters.
        /// </summary>
        public IEffectParameterCollection Parameters {
            get {
                return _parameters;
            }
        }

        /// <summary>
        /// Set the technique collection.
        /// </summary>
        /// <param name="techniques">Technique collection created by the implementor subclass</param>
        protected void SetTechniques(IEffectTechniqueCollection techniques) {
            _techniques = techniques;
        }

        /// <summary>
        /// Set the parameter collection
        /// </summary>
        /// <param name="parameters">Parameter collection by the implementor subclass</param>
        protected void SetParameters(IEffectParameterCollection parameters) {
            _parameters = parameters;
        }

        /// <summary>
        /// Copies this effect, creating a new instance.
        /// </summary>
        /// <returns>Cloned instance of the effect</returns>
        public abstract EffectImplementation Clone();
    }
}
